package com.janko.springbootbase.juc;

import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.LongAdder;

/**
 * @Description 类文件说明
 * @Author nieyankang
 * @Version 1.0
 * @date {date} {time}
 */
public class AtomicVsSyncVsLongAdder_Test {
    static long count2 = 0L;
    static AtomicLong count1 = new AtomicLong(0L);
    static LongAdder count3 = new LongAdder();

    public static void main(String[] args) throws Exception {
        Thread[] threads = new Thread[1000];

        for (int i = 0; i < threads.length; i++) {
            threads[i] = new Thread(() -> {
                        for (int k = 0; k < 100000; k++) count1.incrementAndGet();
            });
        }

        long start = System.currentTimeMillis();
        for(Thread t : threads ) t.start();
        for (Thread t : threads) t.join();
        long end = System.currentTimeMillis();

        System.out.println("Atomic: " + count1.get() + " time " + (end-start));
        //-----------------------------------------------------------
        Object lock = new Object();

        for (int i = 0; i < threads.length; i++) {
            threads[i] = new Thread(new Runnable() {
                @Override
                public void run() {
                    for (int k = 0; k < 100000; k++) {
                        synchronized (lock) {
                            count2++;
                        }
                    }
                }
            });
        }

        start = System.currentTimeMillis();
        for(Thread t : threads ) t.start();
        for (Thread t : threads) t.join();
        end = System.currentTimeMillis();

        System.out.println("Sync: " + count2 + " time " + (end-start));
        for (int i = 0; i < threads.length; i++) {
            threads[i] = new Thread(() -> {
                for (int k = 0; k < 100000; k++) count3.increment();
            });
        }
        start = System.currentTimeMillis();
        for(Thread t : threads ) t.start();
        for (Thread t : threads) t.join();
        end = System.currentTimeMillis();
        System.out.println("LongAdder: " + count1.longValue() + " time " + (end-start));
    }
}
